Hi Anders
If you are looking for cost effective ways to manage it then I would suggest the below
#1 Hire virtual assistant to handle all the stuff that can be taken care via online ( I think they usually charge around $500 to $700 per month for 8 hrs. So for round the clock help hire 3 ppl. They can follow up with guests about bookings or check-ins/checkouts, answer phone or online enquiries, call repairmen if any repair is heeded, manage cleaning staff or runner schedules , share room access codes with guests, monitor hotel premises for suspicious activity etc.
#2 Install wifi or bluetooth based locks to the units/rooms so that your guests have time stipulated acess to the unit/room
#3 Install outdoor security cameras or doorbell cameras (if possible) to monitor hotel outdoor premises via online.
#4 Hire a runner (like a college/high school student or young guy in search of part time job who charges reasonable hr rate) to inspect the room after the cleaning staff cleans the room or you can ask cleaners to tickmark the check list , share photos/videos of the cleaned rooms and share them. You can ask your VA to cross check those.
#5 appoint a local n reliable person to be available on need basis and pay him whenever he needs to visit the hotel.(when any urgent or emergency visit is required)
#6 take help of booking sites like hotwire or booking.com for increasing occupancy
#7 use other online ways (Google ads etc) to increase bookings